I'm not saying a Hydro-armor Iron Man shouldn't be made, but I hope the IM armors don't turn into the variant strategy Kenner used with Batman (and Mattel continues): Arctic Armor Batman, Lava Blast Batman, Jungle Camo Batman, etc.
Though I guess there's Marvel precedent, as Hasbro has done the same thing with Spidey... sigh
Anybody you see on a pillowcase at Wal-mart????